I have implemented Login with Amazon for my application.
So far stores with Marketplace North America got registered successfully & application is able to manage their campaigns.
But when India Marketplace store gets login on Amazon login page my application is not getting the response from Amazon.

Hi,
While requesting for access to Amazon advertising scope cpc_advertising:campaign_management, you must have received access to a JIRA account. You can use that JIRA account to reach out to Advertising team directly for this query.